Flash Flooding in Sharon

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Too much rain! A thunderstorm in Dutchess County New York moved into the town of Sharon this afternoon dropping an incredible amount of rain in a short period of time. Doppler Radar from Albany indicated 2.50″-3.00″ of rain near the center of Sharon while a viewer told our assignment desk they picked up 3.30″ of rain in 1 hour and 5 minutes!

The torrential rain resulted in flash flooding. Streams and small rivers quickly rose out of their banks. Some driveways washed away and some homes and businesses were flooded as well. Here’s a look at some of the flooding outside of the Sharon Country Inn.

Sharon Country Inn / Courtesy: Whitney Hutton

Sharon Country Inn / Courtesy: Whitney Hutton

Flash flooding in Sharon

Flash flooding in Sharon

The threat for flooding will return tomorrow as more moisture streams up the coast. Our computer models indicate the biggest threat for flooding will be in western sections of Connecticut and Massachusetts.

As for rainfall records it appears Windsor Locks will end the month of June with just shy of 11.00″ of rain. This will make it #2 on the all-time wettest June list behind June of 1982. The rain in ’82 produced devastating flash flooding in southern Connecticut. Bradley Airport recieved 5.88″ of rain on June 5th, 1982 which is the 4th highest rainfall amount in a calendar day (only bested by 9/20/1938, 8/18/1955, and 8/19/1955).

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Heavy Rain Threat Sunday

It’s not the best time of year for a heavy rain event, smack in the middle of the July 4th holiday weekend, but it appears there’s the potential for some torrential downpours tomorrow.

A cold front will approach from the west and a significant amount of moisture will stream north. In addition, very weak winds from the ground up through 35,000 feet, will result in very slow movement of thunderstorms that do develop.

Here’s a 18z NAM BUFKIT forecast sounding from BDL. Ingredients for heavy rain are there with instability, large amounts of moisture, and weak steering flow.

18z NAM BUFKIT Sounding for BDL

If numerous thunderstorms are able to form along a stalled surface front there is a risk for flash flooding in some locations. Not every town is going to see big downpours tomorrow but some certainly will.

Severe weather will not be widespread with little wind shear and only modest instability. If the instability winds up being more impressive than currently forecast (steeper mid level lapse rates and/or more morning sunshine) than there is the risk for pulse severe thunderstorms producing downbursts.

Never a Good Sign

00z Friday GFS Forecast

Cut-off lows in the warm season are almost always bad news. When they’re to our west humidity, clouds, and areas of rain and storms are likely.

It’s hard to pin down where or when the greatest threat for heavy rain is but it could be pretty soggy for a period of time Thursday through Saturday. These setups can lead to flash flooding but it’s been fairly dry lately so I’m not overly concerned about flooding at this point.

If you plan to go to the Travelers stay tuned to the forecast!